US3080343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamine-urea-thiourea copolymer
Assignee: Monsanto Chemicals Ltd
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Filing: 1959-01-28
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Granted: 1963-03-05
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Expires: 1979-01-28
Abstract
No abstract record available.
Inventors
- 👤 George E Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:21
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A METHOD OF PRODUCING A FIBER-FORMING COPOLYMER COMPRISING FORMING A MIXTURE OF INGREDIENTS COMPRISING (A) AN ORGANIC DIAMINE SELECTED FROM THE GROUP CONSISTING OF SATURATED ALIPHATIC PRIMARY AND SECONDARY DIAMINES IN WHICH THE REACTIVE PRIMARY AND SECONDARY DIAMINES LINEAR CHAIN OF AT LEAST 4 ATOMS AND BASIS PHENYL AROMATIC PRIMARY AND SECONDARY DIAMINES IN WHICH THE SHORTEST CARBON CHAIN CONNECTING THE REACTVE AMINO GROUPS N CLUDES AT LEAST THREE CARBON ATOMS OF ONE RING; (B) THIOUREA; AND (C) UREA; SAID DIAMINE BEING PRESENT IN A MOL PERCENT OF ABOUT 30 TO 50 BASED ON THE FINAL PRODUCT, SAID THIOUREA BEING PRESENT IN A MOL PERCENT OF 5 TO 30 BASED ON THE FINAL PRODUCT, AND SAID UREA BEING PRESENT IN A MOL PERCENT OF 20 TO 60 BASED ON THE FINAL PRODUCT THE TOTAL OF THE THREE COMPONENTS BEING 100 MOL PERCENT, AND HEATING THE RESULTING MIXTURE AT AN ELEVATED TEMPERATURE UNTIL A VISCOUS MOLTEN MASS IS OBTAINED FROM WHICH COLDDRAWABLE FIBERS MAY BE FORMED.
Claim 2
Independent Claim
165 words
A METHOD OF PRODUCING A FIBER-FORMING COPOLYMER COMPRISING FORMING A MIXTURE OF INGREDIENTS COMPRISING (A) AN ORGANIC DIAMINE SELECTED FROM THE GROUP CONSISTING OF SATURATED ALIPHATIC PRIMARY AND SECONDARY DIAMINES IN WHICH THE REACTIVE PRIMARY AND SECONDARY DIAMINES LINEAR CHAIN OF AT LEAST 4 ATOMS AND BASIS PHENYL AROMATIC PRIMARY AND SECONDARY DIAMINES IN WHICH THE SHORTEST CARBON CHAIN CONNECTING THE REACTVE AMINO GROUPS N CLUDES AT LEAST THREE CARBON ATOMS OF ONE RING; (B) THIOUREA; AND (C) UREA; SAID DIAMINE BEING PRESENT IN A MOL PERCENT OF ABOUT 30 TO 50 BASED ON THE FINAL PRODUCT, SAID THIOUREA BEING PRESENT IN A MOL PERCENT OF 5 TO 30 BASED ON THE FINAL PRODUCT, AND SAID UREA BEING PRESENT IN A MOL PERCENT OF 20 TO 60 BASED ON THE FINAL PRODUCT THE TOTAL OF THE THREE COMPONENTS BEING 100 MOL PERCENT, AND HEATING THE RESULTING MIXTURE AT AN ELEVATED TEMPERATURE UNTIL A VISCOUS MOLTEN MASS IS OBTAINED FROM WHICH COLDDRAWABLE FIBERS MAY BE FORMED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |